I was going to ask the exact same thing, I have a FLer and bleach the nighttime diapers regularly. I mean, not being able to put bleach into a washing machine seems ridiculous.

ETA -- > do you think it's your diapers that aren't getting clean, or perhaps the fabric? My son had a lot of rash problems until I stopped using PUL and kept him in diapers that had stay-dry inners and breathable covers.